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java.util.ConcurrentModificationException: 	at org.gradle.api.internal.DefaultDomainObjectCollection$IteratorImpl.next(DefaultDomainObjectCollection.java:291)	at org.gradle.api.internal.CompositeDomainObjectSet$SetIterator.fetchNext(CompositeDomainObjectSet.java:156)	at org.gradle.api.internal.CompositeDomainObjectSet$SetIterator.next(CompositeDomainObjectSet.java:175)	at org.apache.commons.collections.iterators.IteratorChain.next(IteratorChain.java:265)	at org.gradle.api.internal.CompositeDomainObjectSet$SetIterator.fetchNext(CompositeDomainObjectSet.java:156)	at org.gradle.api.internal.CompositeDomainObjectSet$SetIterator.next(CompositeDomainObjectSet.java:175)	at com.android.build.gradle.internal.DependencyManager.ensureConfigured(DependencyManager.java:485)	at com.android.build.gradle.internal.DependencyManager.resolveDependencyForConfig(DependencyManager.java:267)	at com.android.build.gradle.internal.DependencyManager.resolveDependencies(DependencyManager.java:159)	at com.android.build.gradle.internal.TaskManager.resolveDependencies(TaskManager.java:364)	at com.android.build.gradle.internal.VariantManager$9.call(VariantManager.java:636)	at com.android.build.gradle.internal.VariantManager$9.call(VariantManager.java:633)	at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:156)	at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:120)	at com.android.build.gradle.internal.profile.SpanRecorders.record(SpanRecorders.java:44)	at com.android.build.gradle.internal.VariantManager.createVariantData(VariantManager.java:629)	at com.android.build.gradle.internal.VariantManager.createVariantDataForProductFlavors(VariantManager.java:823)	at com.android.build.gradle.internal.VariantManager.populateVariantDataList(VariantManager.java:512)	at com.android.build.gradle.internal.VariantManager$1.call(VariantManager.java:269)	at com.android.build.gradle.internal.VariantManager$1.call(VariantManager.java:266)	at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:156)	at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:120)	at com.android.build.gradle.internal.VariantManager.createAndroidTasks(VariantManager.java:265)	at com.android.build.gradle.BasePlugin$11.call(BasePlugin.java:688)	at com.android.build.gradle.BasePlugin$11.call(BasePlugin.java:685)	at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:156)	at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:120)	at com.android.build.gradle.BasePlugin.createAndroidTasks(BasePlugin.java:683)	at com.android.build.gradle.BasePlugin$10.call(BasePlugin.java:608)	at com.android.build.gradle.BasePlugin$10.call(BasePlugin.java:605)	at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:156)	at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:120)	at com.android.build.gradle.BasePlugin.lambda$createTasks$1(BasePlugin.java:603)	at org.gradle.internal.event.BroadcastDispatch$ActionInvocationHandler.dispatch(BroadcastDispatch.java:93)	at org.gradle.internal.event.BroadcastDispatch$ActionInvocationHandler.dispatch(BroadcastDispatch.java:82)	at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:44)	at org.gradle.internal.event.BroadcastDispatch.dispatch(BroadcastDispatch.java:79)	at org.gradle.internal.event.BroadcastDispatch.dispatch(BroadcastDispatch.java:30)	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)	at com.sun.proxy.$Proxy15.afterEvaluate(Unknown Source)	at org.gradle.configuration.project.LifecycleProjectEvaluator.notifyAfterEvaluate(LifecycleProjectEvaluator.java:67)	at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:61)	at org.gradle.api.internal.project.DefaultProject.evaluate(DefaultProject.java:573)	at org.gradle.api.internal.project.DefaultProject.evaluate(DefaultProject.java:125)	at org.gradle.execution.TaskPathProjectEvaluator.configureHierarchy(TaskPathProjectEvaluator.java:47)	at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:38)	at org.gradle.initialization.DefaultGradleLauncher$2.run(DefaultGradleLauncher.java:151)	at org.gradle.internal.Factories$1.create(Factories.java:22)	at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)	at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:53)	at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:148)	at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:33)	at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:112)	at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:106)	at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)	at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:63)	at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:106)	at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:92)	at org.gradle.launcher.exec.GradleBuildController.run(GradleBuildController.java:66)	at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28)	at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)	at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:41)	at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:26)	at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:79)	at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:51)	at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:59)	at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)	at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:47)	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)	at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)	at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)	at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)	at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)	at org.gradle.util.Swapper.swap(Swapper.java:38)	at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)	at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55)	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)	at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)	at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)	at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:72)	at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)	at org.gradle.launcher.daemon.server.exec.HintGCAfterBuild.execute(HintGCAfterBuild.java:44)	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)	at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)	at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:293)	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)	at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)